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KCCI Meteorologist Kurtis Gertz said storms could reach the Des Moines metro by about 9:30 p.m.

National Weather Service forecasters said the greatest threat for severe storms is expected in the in southern to southwestern counties -- primarily south of Interstate-80 and west of Interstate-35.

The storms carry large hail as the primary threat, NWS forecasters said. Over 0.5 inch to 1 inch of rain is possible today into tonight, with the greatest totals likely in western counties. Spotty light showers are possible Tuesday morning.

Monday, Severe storms are expected from parts of the southern and central Plains to the lower to mid-Missouri Valley, Ozarks, and Arklatex. Tornadoes and very large hail will be possible from eastern Oklahoma and northeastern Texas into central Arkansas and northern Louisiana.

WEDNESDAY STORMS:

Look for even more storms to develop with a greater chance for severe weather on Wednesday afternoon.

The Wednesday storms carry a chance for large hail, damaging winds, and a few tornadoes, NWS forecasters said. The severe weather threat is expected in the south central and southeastern counties.

Also, expect more humid conditions this week as dewpoints will be in the 60s starting Monday.

Widespread rainfall of 1-2 inches is expected across Iowa from Monday through Wednesday, with some locally heavier amounts possible.